Air conditioning system

Patent metadata

Field	Value
Publication number	US-10495330-B2
Application number	US-201515750571-A
Country	US
Kind code	B2
Filing date	Aug 20, 2015
Priority date	Aug 20, 2015
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

An air conditioning system includes a compressor to compress refrigerant; a first heat exchanger to condense the compressed refrigerant into a supercooled liquid state; a first decompressor to decompress the condensed refrigerant; a second heat exchanger to cause the decompressed refrigerant to absorb heat; a second decompressor to decompress the heated refrigerant; a third heat exchanger to evaporate the decompressed refrigerant; and a blower fan to take in air from outside a room and blow the air to the first heat exchanger. The second heat exchanger is disposed downstream of the first heat exchanger in a blowing direction of the blower fan. A humidifier is disposed between the first heat exchanger and the second heat exchanger in the blowing direction. The air blown from the blower fan is heated by the first heat exchanger, humidified by the humidifier, cooled by the second heat exchanger, and supplied into the room.

First claim

The invention claimed is:

1. An air conditioning system comprising:
a compressor to compress refrigerant;
a first heat exchanger to condense the refrigerant compressed by the compressor into a supercooled liquid state;
a first decompressor to decompress the refrigerant condensed into the supercooled liquid state in the first heat exchanger;
a second heat exchanger to cause the refrigerant decompressed by the first decompressor to absorb heat;
a second decompressor to decompress the refrigerant that has absorbed heat in the second heat exchanger;
a third heat exchanger to evaporate the refrigerant decompressed by the second decompressor; and
a blower fan to take in air from outside a room and blow the air to the first heat exchanger,
wherein the second heat exchanger is disposed downstream of the first heat exchanger in a blowing direction of the blower fan,
wherein a humidifier is disposed between the first heat exchanger and the second heat exchanger in the blowing direction of the blower fan, and
wherein the air blown from the blower fan is heated by the first heat exchanger, humidified by the humidifier, cooled by the second heat exchanger, and supplied into the room.

2. The air conditioning system of claim 1 , wherein the refrigerant changes from the supercooled liquid state to a saturated liquid state in the second heat exchanger.

3. The air conditioning system of claim 2 , wherein a temperature at which the refrigerant changes from the supercooled liquid state to the saturated liquid state in the second heat exchanger is higher than a dew-point temperature of the air that has passed through the humidifier.

4. The air conditioning system of claim 2 , wherein the second decompressor decompresses the refrigerant in the saturated liquid state into two-phase refrigerant.

5. The air conditioning system of claim 1 , further comprising a switching valve to switch a circulating direction of the refrigerant so that the refrigerant flows through the compressor, the third heat exchanger, the second decompressor, the second heat exchanger, the first decompressor, and the first heat exchanger in this order,
wherein a dehumidifying operation is performed by switching the circulating direction of the refrigerant by means of the switching valve and stopping operation of the humidifier.

6. The air conditioning system of claim 1 , further comprising a controller,
wherein the controller controls an amount of condensation heat in the first heat exchanger by controlling at least one of an operational frequency of the compressor and an amount of air blown by the blower fan.

7. The air conditioning system of claim 6 , wherein the controller controls a temperature of the refrigerant in the second heat exchanger by controlling an amount of decompression in the first decompressor.

8. The air conditioning system of claim 1 , further comprising:
a first airflow path to introduce outdoor air;
a second airflow path to introduce indoor air;
a total heat exchanger to exchange heat between the outdoor air and the indoor air flowing into the total heat exchanger through the first airflow path and the second airflow path;
a third airflow path to exhaust the indoor air flowing out of the total heat exchanger outside the room; and
a fourth airflow path to supply the outdoor air flowing out of the total heat exchanger into the room,
wherein the first heat exchanger, the second heat exchanger, and the humidifier are provided in the fourth airflow path.

9. The air conditioning system of claim 8 , further comprising an auxiliary heat exchanger provided in parallel with the first heat exchanger,
wherein the auxiliary heat exchanger is disposed in the third airflow path.

10. The air conditioning system of claim 1 , wherein the air conditioning system operates in conjunction with a room air conditioner to control a temperature of indoor air,
wherein during a cooling operation of the room air conditioner, the air conditioning system detects a cooling load or a cooling capacity of the room air conditioner,
wherein when the detected cooling load or cooling capacity is greater than a reference value, the air conditioning system decreases a temperature of the air supplied into the room, and
wherein when the detected cooling load or cooling capacity is less than the reference value, the air conditioning system increases the temperature of the air supplied into the room.

11. The air conditioning system of claim 1 , wherein the air conditioning system operates in conjunction with a room air conditioner to control a temperature of indoor air,
wherein during a heating operation of the room air conditioner, the air conditioning system detects a heating load or a heating capacity of the room air conditioner,
wherein when the detected heating load or heating capacity is greater than a reference value, the air conditioning system increases a temperature of the air supplied into the room, and
wherein when the detected heating load or heating capacity is less than the reference value, the air conditioning system decreases the temperature of the air supplied into the room.

12. The air conditioning system of claim 1 , wherein the air conditioning system operates in conjunction with a room air conditioner to control a temperature of indoor air, and
wherein the air conditioning system utilizes exhaust heat generated by the room air conditioner as a heat source.

13. The air conditioning system of claim 1 , wherein the first heat exchanger, the first decompressor, the second heat exchanger, and the second decompressor constitute an outside air processing unit, and
wherein the compressor and the third heat exchanger constitute an outdoor unit.

14. The air conditioning system of claim 13 , wherein the outside air processing unit and the outdoor unit are integrated.

Assignees

• Mitsubishi Electric Corp

Inventors

• Horie Hayato
• Hamada Mamoru
• Toyoshima Masaki

Classifications

• F24F11/89

  Arrangement or mounting of control or safety devices · CPC title

• F24F11/77

  by controlling the speed of ventilators · CPC title

• F24F3/153 Primary

  with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature · CPC title

• F24F2140/50

  Load · CPC title

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title